Refrigerating system



Nov. 3, 1931. .Le. DE REMER REFRIGERATING SYSTEM Filed July 30, 1926CONDENSER v ATTORNE g Patented Nov. 3, 1931 UNITED STATES PATENT OFFICEJAY DE REMER, OF GREENWICH, CONNECTICUT, ASSIGNOR, IBY MESNE' ASSIGN-MENTS, T J. G. DEREMER RESEARCH CORPORATION, OF JERSEY CITY, NEW JERSEY,A CORPORATION OF NEW JERSEY REFRIGERATING SYSTEM Application. filed July30,

to theevaporator in such manner as to prevent the entrance of vaporousrefrigerant thereto, and to organize the apparatus required foraccomplishing this purpose in the most compact form. 4 a

The accompanying drawings illustrates the preferred form of theinvention, Figure- 1 being a diagrammatic representation of therefrigerating circuit, Figure 2 a larger scale longitudinal section ofthe device for preventing the entrance of' vaporous refrigerant into theevaporator, and Figure 3 a perspective detail illustrating theorganization of said device in a refrigeratorcabinet.

From the diagram it will be apparent that the compressor 1 deliverscompressed or liquid refrigerant into and through the condenser to thetop of the valve chamber 2, thence by pipe 3 to the evaporator 4, whereheat is absorbed with refrigerant eflect'in any appropriate manner.Theevaporated refrigerant is conducted by return pipe 5 around or inheat exchanging relation to the valve chamber 2 and thence back to thecompressor 1.- The compressor may be of any desired type, being hereinshown as a mercury type compressor such as-disclosed in my prior PatentNo. Re. 15,590 and the evaporator is shown as of the unit type?disclosed in my co-pending application, although any other suitable formof evaporator may be employed in its place. The refrigerant'usedisgenerally butane or the like. 1

'The condenser is connected to the top of the valve chamber 2 and thelater contains an outlet valve 6 at its bottom leading into the liquidpipe 3, the outlet, controlled by the valve 6, constituting theso-called expansion valve between the high and the low pressure sides ofthe delivery to the evaporator. The valve .6 is connected by its valvestem which extends freely through the float 7 to a lever 8,'one end ofwhich is connected by a bracket 9 with the top of the float and theother end of which carries a counterweight 1926. Serial No. 125,848.

10. The fulcrum of the lever is provided by a depending bracket 11appropriately supported in the upper part of the valve chamber. As thusarranged, the valve is opened by the increasing liquid leveljn the valvechamber and is closed when the level falls below a predeterminedminimum, thus precluding the entry of vaporous refrigerant into theevaporator.

If within the limits imposed by its temperature and pressure, the liquidin the valve chamber vaporizes to such extent that the vapor excludesfurther entry of liquid from the condenser, the valve becomes gas boundand the system ceases to function until the condenser pressure builds upsufliciently to condense the vapor or overcome its pressure. Such asituation may occur during the operation of the apparatus although it ismore likely to arise as the result of an extended period of idleness ofthe apparatus. In-order therefore to prevent such interruption duringworking and to expedite the reinstatement of normal delivery conditionsof the refrigerant after such a period of idleness. the vapor pipe 5 isbrought into cooling relation to the valve chamber, which may be done bycoiling it around the latter as indicated, or in any other mannercustomary for heat exchangers. N 0 communication is provided between thevapor pipe 5 and the valve chamber, except for transfer of heat throughthe wall of the latter. There is normally a suf ficient refrigeratingcapacity left in the vapor returning through pipe 5 to maintain thevalve chamber at a sufliciently low temperature so that the possibilityof its becoming gas bound is practically eliminated, or reduced to avery unobjectionable minimum,-

effect of the vapor in pipe 5, which would Stherwise be dissipated inthe surrounding atmosphere, is now saved and at the same time theobjectionable condensation drip from the length of pipe 5, between thecabinet and the compressor is avoided. The heat-exchanging relation thusperforms three useful functions inn which are accomplishedat.no.-..-greater cost .than the cost, of the extra tubing representedby the coil around the valve chamber. i The parts marked 12 are merelycouplings,

.by means of which-the described device can be made up separately andthen conveniently assembled in" a recess formed in the relativelythickheat-insulating"'vvall 13 of the refrigerating cabinet and thenconnected up into the system as indicated in the diagram.

'In this position it is covered over zby a suitable plate, not shown,and the heat-insulating material, of which the cabinet wall is made,thus assists in'protecting the valve ,chamber 15 from externalatmospheric tern erature, and

thereby suflices tokeep the liquid therein below the criticaltemperature during the standby periods of the compressor.

For the accommodation of the-valve chamber in the position stated, it ismade long as compared to its diameter, the float having substantiallythe same proportions as the chamber, and the whole device is thus notonly kept from encroaching on the space within '25 the cabinet, but alsodoes not project from the exterior of the cabinet, and is, at the sametime, best located for performing its par ticular functions. I

Claims:

so 1. The'combination. with a refrigerating cabinet of areirig'eratingcircuit containing an evaporator, located in the cabinet, a device for.preventing vaporous refrigerant from entering the evaporator, saiddevicebeing located in theQcabinet wall and'a return vapora-li'ne'le'ading'rfirom said evaporator inside the' cabinet into heat-absorbingrelation to said device in the cabinet wall. 1 2. The combination in arefrigerating sys- 40 tom of a'condenser and an evaporator, a valvechamber, an inlet thereto from the condenser and an outlet to theevaporator, a float-operated valve in said chamber controlling theoutlet, and a vapor return line from the evaporator to; the compressor,said chamber elongated in the direction of valve movenept and'saidreturn line coiled around said chamber throughout a substantial portionof the length of the same in heat-exchanging relation therewith. v v i3.- The combil tion in an intermittently operated compressi refrigeratinsystem of -a condenser,-an eva ator, a cham er having an outlet andcontaining a float-controlled 55. 'valve therefori the rising of thefloat serving to open the va ve,.a refrigerant line from the compressorto the condenser, thence to said chamber and from said chamber, underthe control of the valve, to the evaporator and a return line therefromto the compressor, said return line including a part surrounding saidchamber in heat exchanging relation thereto.-

"In testimony whereof, I have signed this q specification. U

JAY G. DE REMER.

